Dual-bay SATA docks - recommendations?

I'm looking for a 2-bay (or more) SATA drive dock with USB 3.0 connection. It will be used to back up a very large photo archive (3TB) from one SATA drive to another, so reliability is the most important aspect for me.

Have seen a few drives on offer such as StarTech, Syba, Thermaltake and read their reviews. As usual some say people say they're great others have issues.

So I am looking for any recommendations from people who actually have one and use it regularly on OS X.

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